| commit | bf4bb953081f11fbec9a1c0ea08b428c744b369e | [log] [tgz] |
|---|---|---|
| author | Alexander Markov <alexmarkov@google.com> | Fri Apr 29 01:03:50 2022 +0000 |
| committer | Commit Bot <commit-bot@chromium.org> | Fri Apr 29 01:03:50 2022 +0000 |
| tree | 56af84b00a740c98d46865f30bd033af2c86d4f2 | |
| parent | fcc916988596e83bd81993b02e0f12b024375f61 [diff] |
[vm] New async/await implementation in the VM, part 2 - vm The new implementation moves away from desugaring of async functions on kernel AST, state machine generated in the flow graph and capturing all local variables in the context. Instead, async/await is implemented using a few stubs (InitSuspendableFunction, Suspend, Resume, Return and AsyncExceptionHandler). The stubs are implemented in a platform-independent way using (macro-)assembler helpers. When suspending a function, its frame is copied into a SuspendState object, and when resuming a function it is copied back onto the stack. No extra code is generated for accessing local variables. Callback closures are created lazily on the first await. Design doc: go/compact-async-await. Part 1 (kernel): https://dart-review.googlesource.com/c/sdk/+/241842 TEST=ci Issue: https://github.com/dart-lang/sdk/issues/48378 Change-Id: Ibad757035b7cc438ebdff80b460728b1d3eff1f5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/242000 Reviewed-by: Ryan Macnak <rmacnak@google.com> Reviewed-by: Slava Egorov <vegorov@google.com>
Dart is:
Optimized for UI: Develop with a programming language specialized around the needs of user interface creation.
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Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web.
Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:
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